docs: def set_USRdict(self,USRdict={}):
          """ Set the USRdict, containing user-defined info about the instance
  
          Useful for arbitrary info (e.g.: manufacturing date, material...)
  
          Parameters
          ----------
          USRdict :   dict
              A user-defined dictionary containing info about the instance
  
          """
          self._check_inputs(USRdict=USRdict)
          self._USRdict = USRdict